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<html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><title>Chapter 1. Introduction</title><link rel="stylesheet" href="docbook.css" type="text/css" /><meta name="generator" content="DocBook XSL Stylesheets V1.73.2" /><link rel="start" href="index.html" title="PHP Secure Communications Library" /><link rel="up" href="index.html" title="PHP Secure Communications Library" /><link rel="prev" href="index.html" title="PHP Secure Communications Library" /><link rel="next" href="math.html" title="Chapter 2. Math" /></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">Chapter 1. Introduction</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="index.html">Prev</a> </td><th width="60%" align="center"> </th><td width="20%" align="right"> <a accesskey="n" href="math.html">Next</a></td></tr></table><hr /></div><div class="chapter" lang="en" xml:lang="en"><div class="titlepage"><div><div><h2 class="title"><a id="intro"></a>Chapter 1. Introduction</h2></div></div></div><div class="toc"><p><b>Table of Contents</b></p><dl><dt><span class="section"><a href="intro.html#intro_intro">1.1. Who should use phpseclib</a></span></dt><dt><span class="section"><a href="intro.html#intro_usage">1.2. Using phpseclib</a></span></dt></dl></div><div class="section" lang="en" xml:lang="en"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a id="intro_intro"></a>1.1. Who should use phpseclib</h2></div></div></div><p>
                Although many of the features this library implements are implemented in PHP via optional extensions, what are 
                you, as a developer, going to do when a user tries to run your software on a host which, coincidentally, doesn't 
                happen to have that optional extension installed?  You could, flat-out, tell that user to look for another 
                software package that does work on their server (or to get another host, or whatever), which is liable to leave 
                a bad impression on the user, or you could use a library like this - a library that uses those optional 
                extensions if they're available and falls back on an internal PHP implementation if they're not.
            </p><p>
                Another advantage of using this library over optional PHP extensions is that you, as a developer, may find this 
                libraries API easier to use then extensions API.
            </p></div><div class="section" lang="en" xml:lang="en"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a id="intro_usage"></a>1.2. Using phpseclib</h2></div></div></div><p>
                This library is written using the same conventions that libraries in the PHP Extension and Application Repository (PEAR) 
                have been written in.  In particular, this library expects to be in your <code class="code">include_path</code>:
            </p><pre class="programlisting">&lt;?php
set_include_path(get_include_path() . PATH_SEPARATOR . 'phpseclib');

include('Net/SSH2.php');
?&gt;</pre></div></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="index.html">Prev</a> </td><td width="20%" align="center"> </td><td width="40%" align="right"> <a accesskey="n" href="math.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">PHP <span class="red">Secure</span> Communications Library </td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"> Chapter 2. Math</td></tr></table></div></body></html>
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